feat(qemu-sbsa): relocate DT after the RMM when RME is enabled
When RME is enabled, (1) the RMM is installed at the base of system RAM,
(2) the base of the system RAM is shifted upward, after the RMM and (3)
the device tree is relocated to the new system RAM base.
This patch relocates the device tree to the new system RAM base before
the RMM is installed in RAM. From there, other accesses to the device
tree are using the new location.
Change-Id: I0cb4e060ca33a11becd78fe48fab4dc76f0b484b
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
diff --git a/plat/qemu/common/qemu_common.c b/plat/qemu/common/qemu_common.c
index 9ccb2c8..3521330 100644
--- a/plat/qemu/common/qemu_common.c
+++ b/plat/qemu/common/qemu_common.c
@@ -332,3 +332,25 @@
return 0;
}
#endif /* ENABLE_RME */
+
+/**
+ * plat_qemu_dt_runtime_address() - Get the final DT location in RAM
+ *
+ * When support is enabled on SBSA, the device tree is relocated from its
+ * original place at the beginning of the NS RAM to after the RMM. This
+ * function returns the address of the final location in RAM of the device
+ * tree. See function update_dt() in qemu_bl2_setup.c
+ *
+ * Return: The address of the final location in RAM of the device tree
+ */
+#if (ENABLE_RME && PLAT_qemu_sbsa)
+void *plat_qemu_dt_runtime_address(void)
+{
+ return (void *)(uintptr_t)PLAT_QEMU_DT_BASE;
+}
+#else
+void *plat_qemu_dt_runtime_address(void)
+{
+ return (void *)(uintptr_t)ARM_PRELOADED_DTB_BASE;
+}
+#endif /* (ENABLE_RME && PLAT_qemu_sbsa) */